Osmotic Pressure Calculator
🧪 Solutions & Molarity. Use the Osmotic pressure formula to find osmotic pressure π, van 't hoff factor i, molarity, temperature: pick the value you want, type the others, and the answer updates as you go.
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| Osmotic pressure Π | atm |
| van 't Hoff factor i | no unit |
| Molarity | mol/L |
| Temperature | K |
Worked example
Find the osmotic pressure π when van 't Hoff factor i = 1, Molarity = 1 mol/L, Temperature = 298 K.
Using = iMRT: Osmotic pressure Π = 24.453 atm.
Frequently asked questions
What is the formula for Osmotic pressure?
= iMRT.
What do the letters stand for, and what units are used?
Osmotic pressure Π in atm, van 't Hoff factor i, Molarity in mol/L, Temperature in K.
How do you calculate osmotic pressure π?
Put the values into = iMRT. For example, with van 't Hoff factor i = 1, Molarity = 1 mol/L, Temperature = 298 K, osmotic pressure π = 24.453 atm.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (osmotic pressure π, van 't hoff factor i, molarity, temperature) and fill in the others: it rearranges the formula for you.
